Tubes - Printable Version

+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: Tubes (/showthread.php?tid=5918)

---

Tubes - philco4me - 02-05-2013

My 46-1209 has a 7n7 where the 7af7 should be. This radio has been in the family since new so should I keep the 7n7 or replace it with the correct tube

---

RE: Tubes - John R - 02-05-2013

A 7N7 is a direct sub for the 7AF7. The only major difference is the 7N7 has a filament draw of 0.6 amps
vs 0.3 amps for the 7AF7. Is probably not a problem for your power transformer as tubes V4/V5 have a
seperate filament winding.

---

RE: Tubes - klondike98 - 02-05-2013

Checking the NJ7P Tube Database at http://www.nj7p.org/Tube.php , the 7n7 is a substitute for the 7af7 so if its working OK I'd leave it.

---